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I am trying to find the technical specs for the mounting hole that a powered tongue jack goes through on a A-frame trailer hitch. There's a big hole in the center for the tongue jack post, and three bolt-hole in a triangle around it. But what are the hole diameters and positions?
P.S. I've gone through an hour or so of Google searching, and called three different "manufacturers." There are lots of trailer plans on the Web, but they're for-sale.

I don't remember but I was modifying the search words as I went along, something like tounge jack bolt ... The only experience I have with trailers is being in a double-wide. That was like being in the Taj Mahal.